Sure. Here's one of the biggest issues with this setup as a whole - notice how this large and circular PV lobe passes through Central Canada on Saturday, as energy is getting ready to eject eastward into the middle of the country. This is a very poor position, orientation and alignment to have. I have no idea what you mean by "warm air advection would not matter as much" since it is literally what is driving precipitation on every model.
After this time, the GFS suggests that this piece will slide eastward into Southeastern Canada, acting to keep the frontal zone associated with our potential storm system slightly further south. With very little help from the NAO or the Atlantic as a whole, I have a hard time believing that this idea is correct. Even if it is marginally correct, the boundary layer is completely affected by the low pressure that develops to the north - and the mid levels are driven by the warm air advection process occurring as the shortwave moves toward our area from the Southeast.
The European is even less favorable, with the entire TPV lobe centered in Central Canada and heights allowed to open up on the East Coast as a result. Without any Atlantic blocking, this is the solution that makes the most sense to me. Does that mean it's guaranteed? No. But my opinion is that we will simply be lucky (and I will be wrong) if this storm system happens to slide eastward and southward far enough for us to get snow.
This is not a good synoptic setup by any stretch of the imagination, and furthermore I am not using or cherry-picking model solutions to prove my point. My opinion is based on the larger scale synoptic pattern evolution at hand throughout the hemisphere, and that's why I am comfortable siding with the warmer ECMWF idea and the likelihood that this system will not bring notable snowfall to the I-95 corridor.